EP 1792073 A1 20070606 - INJECTION NOZZLE
Title (en)
INJECTION NOZZLE
Title (de)
EINSPRITZDÜSE
Title (fr)
INJECTEUR
Publication
Application
Priority
- EP 2005053615 W 20050725
- DE 102004044461 A 20040915
Abstract (en)
[origin: WO2006029933A1] The invention relates to an injection nozzle (1) for an internal combustion engine, particularly in a motor vehicle, comprising: a nozzle needle (3), which can be displaced with an adjustable stroke inside a nozzle body (2) and which serves to control an injection of fuel through at least one injection hole (4); a piezo actuator (9) that, when actuated, drives the nozzle needle (3) or a needle assembly (11) comprising the nozzle needle (3) via a hydraulic coupling (10) for opening or closing, whereby; the hydraulic coupling (10) has an actuator piston (12), which is drive-connected to the piezo actuator (9) and which has a control surface (13) delimiting a control space (14), and; an actuation of the piezo actuator (9) drives the actuator piston (12) in order to modify a control space volume. The injection valve (1) can be provided with a simplified design by virtue of the fact that: the hydraulic coupling (10) has an intensifier piston (15) drive-connected to nozzle needle (3) or to the needle assembly (11); the actuator piston (12) and the intensifier piston (15) are coaxially arranged inside one another and enclose the control space (14), and; in order to open the nozzle needle (3), the piezo actuator (9) drives the actuator piston (12) in order to enlarge the control space volume.
IPC 8 full level
F02M 47/04 (2006.01); F02M 51/06 (2006.01)
CPC (source: EP)
F02M 51/0603 (2013.01); F02M 61/167 (2013.01); F02M 2200/703 (2013.01)
Citation (search report)
See references of WO 2006029933A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2006029933 A1 20060323; CN 101023262 A 20070822; DE 102004044461 A1 20060330; EP 1792073 A1 20070606
DOCDB simple family (application)
EP 2005053615 W 20050725; CN 200580031102 A 20050725; DE 102004044461 A 20040915; EP 05775883 A 20050725